Lucky for you its pretty safe to say that they are probably going to end it where they are, and call it quits.
The newer ones really weren't as good, but thats just because we're used to seeing this kind've stuff now. I think thats the only reason why Star Wars was so popular in the first place. When it came out in the 70's, no one had really seen anything like that, so it was just absolute amazing. Now, however, movies like that come out every year. True Star Wars has a great plot, and it was revolutionary as far as filmography is concerned; I agree that its run its course.
There will never be any sequel better than the original three.